diff --git a/srcfiles/src b/srcfiles/src
index 88c1771..3489a9e 100644
--- a/srcfiles/src
+++ b/srcfiles/src
@@ -258,6 +258,7 @@ git git@github.com:joachimschmidt557/zig-visitor zig-visitor
 git git@github.com:joachimschmidt557/zig-observer zig-observer
 git git@github.com:joachimschmidt557/zig-wcwidth zig-wcwidth
 git git@github.com:joachimschmidt557/zig-smaz zig-smaz
+git git@github.com:joachimschmidt557/undo-tree undo-tree
 git git@github.com:joachimschmidt557/mal mal
 git git@github.com:joachimschmidt557/adventofcode2019 adventofcode2019
 git git@github.com:joachimschmidt557/adventofcode2020 adventofcode2020